Recoil-gun.



0. LAUBER & F. BGMINGHAUS.

REGOIL GUN.

APPLICATION FILED APR. 30, 1907.

Patqnted May 25, 1909.

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OTTO LAUBER AND FRANZ BOMI NGHAUS, OF ESSEN-ON-THE-RUHR, GERMANY, ASSIGNORS TO FRIED. KRUPP AKTIENGESELLSOHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.

RE COIL-GUN.

Specification of Letters Patent.

Application filed. April 30, 1907. Serial No. 371,061.

Patented May 25, 1909.

. To all whom it may concern:

Be it known that we, OTTo LAUBER and FRANZ BoMINGHAUs, residing at Essen-onthe-Ruhr, Germany, both subjects of the Emperor ofGermany, have invented a certain new and useful Im rovement in Recoil- Oruns, of which the folibwing is a specification.

The present invention relates to a recoilgun with fluid brake in which, when the gun arrel is elevated, a part of the brake is automatically adjusted to regulate the length of recoil.

One embodiment of the invention is shown in the accompanying drawings by the way of example.

Figure 1 shows those parts of a barrel recoil gun to which the invention relates, partly in side view and partly in vertical longitudinal section; Figs. 2 and 3 are sections on line 22 and 33, Fig. 1, looking from the left; Fig. 4 shows a part of Fig. 2 but with some parts in another position; Fig. 5 shows a part of Fig. 2 on an enlarged scale and with a somewhat different construction, and Fig. 6 is a section on line 6-6, Fig. 5.

Reference will first be had to the embodi' ment shown in Figs. 1 to 4.

The gun-barrel A is mounted to slide on the track-carrier B, which is swingingly mounted in the cradle O through the medium of horizontal trunnions which are mounted on arms 5 and one of which is shown in the drawings. The cradle forming a part not partaking of the elevation of the gun, is connected to the carrier B by an elevatin mechanism and can, by means of a latera training mechanism, be swung relatively to the mount D about the axis of the vertical trunnion c which is journaled in the mount.

The training and elevating mechanisms, which are not shown in the drawings, may be of any suitable construction.

The interior of the carrier B contains the hydraulic brake E F and the recuperator spring G. The brake cylinder E is rigidly connected to the horn a of the breech of the gun-barrel, while the piston rod F is rotatably but non-slidably mounted in the cap L which closes the carrier B. The brakepiston consists of a piston-body H rigidly connected to the piston rod F and a rotary disk J. For the passage of the fluid from one side of the piston to the other passageways h and '5 are provided in the piston body H and in bearings b on the carrier.

in the rotary disk J. A projection 73 on the disk J engages in a curved groove 6 cut in the wall of the brake cylinder.

Within the carrier B a shaft K is journaled The shaft K extends parallel to the piston-rod F and is positively connected thereto by means of a pair of intermeshing toothed sectors 'M N (Figs. 1 and 3).

That end of the shaft K which is nearest the breech of the gun-barrel is provided with an arm P which projects through a slot b in the carrier B and in one of the trunnionarms b and terminates in a ball-pivot p which is journaled in one end g of a link Q which has its other end g formed as bearing for a second ball-pivot r. The pivot r is located on a bolt R secured in the cradle G.

The arrangement of the parts P Q R is clearly shown in the drawings and particular attention is to be paid to the fact that both balljoints (p g and 9 are eccentrically disposed relatively to the axis of the horizontal trunnions.

When the several parts of-the gun assume the positions shown in Figs. 1 to 3, the brake is adjusted for the longest recoil, as the passageways zof the rotary disk J completely register with the passageways h of the piston body H (Fig. 2). J

If now the gun barrel is elevated, the arm P and the link Q are carried along therewith and the link Q swings about the center of the ball-pivot r as the cradle C does not partake of the movement of the gun-barrel. During the elevating of the gun-barrel the center of the ball-pivot 1) therefore moves along the arc x.r (Fig. 1) that is to say it moves toward the axis of the trunnions and this results in the arm P effecting a swinging movement in the direction of the arrow Y (Fig. 2). During this proceeding, a small movement takes place in the two ball-joints (10 g and r The turning movement of the arm P is partaken of by the shaft K and through the medium of the toothed sectors M N, by the piston rod F which, together with the pistonody H turns in the direction of the arrow Z (Fig. 2). If the gun-barrel is elevated about 50 the arm P moves to the position shown in Fig. 4 in which the passageways i are about half covered by the piston-body and the recoiling parts of the gun will therefore have come to rest when they have moved about half the way of the longest recoil.

It is evident that for each elevation between 0 and a recoil corresponds which lies between the longest and that which is obtained by the adjustment of the brake shown in Fig. 4.

The above-described device for automatically adjusting the brake is mainly distinguished from the known devices of this kind by being very simple and also by acting in a reliable manner. It can further easily be made without play and the frictional losses are very small.

According to Figs. 5 and 6 the link, which connects the arm P with the bolt R, may consist of two parts S S having their opposing ends provided with right-hand and left-hand screw-threads and coupled together by means of a corres ondingly threaded sleeve T. By turning t e sleeve T the link S S can be lengthened or shortened. A spring V which is secured in the link-part S can enter into engagement with a notch 15 in the sleeve T to secure the sleeve against accidental turning.

By means of the last-described arrangement it is possible, on assembling the brake, to adjust the shaft K in such a manner that, when the sector M is shoved on the square which is provided therefor on the shaft K, its teeth fit snugly in the spaces between the teeth of the sector N, the position of which is determined by the relative position of the passageways h c". The improved arrangement therefore facilitates the assemblage of the brake; it further makes it possible to compensate for small inaccuracies caused by wear or originating from the preparation of the details, which inaccuracies influence the relative position of the throttling members H J. Moreover, by suitable adjustment of the length of the link and the resulting change in the relative position of the throttling members H J, it is possible to compensate for such non-uniformities in the recoillengths which, for the same elevation, may arise from various causes, such as from condensation of the brake-fluid. Instead of the ball-joints any other universal joint performing the same function may be used.

The invention is also adapted for guns in which another part of the brake is adjustable to regulate the length of recoil.

Having now described the invention, what is claimed as new is 1. In a recoil gun, the combination with the gun barrel and a gun part not partaking of the elevation of the gun, of a recoil brake partaking of the elevation of the gun barrel and adjustable to regulate the length of the recoil, a shaft extending longitudinally of the brake and connected to the brake to adjust the same, and a link arranged between the shaft and the gun part not partaking of the elevation of the gun, said link being formed of two members adjustable relatively to each other.

2. In a recoil gun, the combination with the gun barrel and a gun part not partaking of the elevation of the gun, of a recoil brake partaking of the elevation of the gun barrel and adjustable to regulate the length of the recoil, a shaft extending longitudinally of the brake and connected to the brake to ad just the same, and an extensible link arranged between the shaft and the gun part not partaking of the elevation of the gun.

3. In a recoil gun, the combination with a gun barrel and a part not partaking of the elevation of the gun, of a recoil brake partaking of the elevation of the gun barrel and adjustable to regulate the length of the recoil, and an adjustable connection between the recoil brake and the part not partaking of the elevation whereby the length of the recoil is adjusted when the gun is elevated.

The foregoing specification signed at Di'isseldorf, Germany, this 22nd day of March, 1907.

OTTO LAUBER. FRANZ BOMINGHAUS.

In presence of ALFRED POHLMEYER, PETER LIEBER. 

